<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表排序</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>{{titl}}</h2>
        <input type="text" v-model="keyword" placeholder="请输入关键字"> 
        <button @click="sortType = 1">年龄升序</button>
        <button @click="sortType = 2">年龄降序</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <li v-for="(p,index) in filePersons" :key="p.id">
                {{p.name}} -- {{p.age}}
            </li>
        </ul>
    </div>
    

    <script>
        const vm = new Vue({
            el:"#root",
            data() {
                return {
                    titl:"人员列表信息",
                    persions:[
                        {id:"001",name:"马冬梅",age:42},
                        {id:"002",name:"周冬雨",age:19},
                        {id:"003",name:"周杰伦",age:25},
                        {id:"004",name:"特伦苏",age:20}
                    ],
                    keyword:'',
                    sortType:0
                }
            },
            computed:{
                filePersons(){
                    var arr = this.persions.filter((p)=>{
                        return p.name.indexOf(this.keyword) != -1
                    })
                    //判断数组是否需要操作
                    if(this.sortType){
                        arr.sort((p1,p2)=>{
                            return this.sortType === 1 ? p1.age - p2.age : p2.age - p1.age;
                        })
                    }
                    return arr;
                }
            }
        })
    </script>
</body>
</html>